Optical method for inspecting transparent or translucent articles intended to allocate a reference optical adjustment to the vision system
US9518937B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2013 |
| Grant date | Dec 13, 2016 |
| Priority date | — |
| Expiry date | Dec 8, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/74
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of inspecting articles of transparent/translucent material with a vision system comprises illuminating the articles with a light source having an angular spectrum that is adapted to the contrast selected for refractive items presented by the articles. An image sensor picks up the light that has passed through the articles to make images of the articles. During a stage of referencing the vision system, a reference standard is in the field of view of the image sensor, the standard including at least one standard item that refracts light in a known range of angles. An image of the standard is taken to measure at least the contrast in the image produced by at least one standard item. During at least one stage of qualifying the vision system, the standard is placed once more in front of the light source and in the field of view of the image sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.